We use a dataset with geolaction of the main cities in Spain, as well as data regarding male and female population, region and province.
## 'data.frame': 8112 obs. of 9 variables: ## $ region : Factor w/ 18 levels "Andalucía","Aragón",..: 1 1 1 1 1 1 1 1 1 1 ... ## $ province : Factor w/ 52 levels "A Coruña","Álava",..: 5 5 5 5 5 5 5 5 5 5 ... ## $ city : Factor w/ 8095 levels "Ababuj","Abades",..: 32 36 56 168 199 208 262 279 295 415 ... ## $ lat : num 37.1 37.1 36.7 37.3 37 ... ## $ lng : num -2.78 -2.8 -3.02 -2.18 -2.62 ... ## $ altitude : num 871 977 11 481 388 ... ## $ population: int 1504 1341 24373 815 674 11178 908 603 141 724 ... ## $ males : int 783 682 12338 422 334 5731 486 315 74 363 ... ## $ females : int 721 659 12035 393 340 5447 422 288 67 361 ...